A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogramfor the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer thequestion. The blood pressure readings were given to the nearest whole number.
-Given that 900 people were aged between 25 and 40, approximately how many had a systolic blood pressure reading between 140 and 149 inclusive?

Question

A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogramfor the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer thequestion. The blood pressure readings were given to the nearest whole number. 
-Given that 900 people were aged between 25 and 40, approximately how many had a systolic blood pressure reading between 140 and 149 inclusive?

Quizplus · Accepted Answer

Approximately 8% of people aged between 25 and 40 have a systolic blood pressure reading between 140 and 149. Therefore, 8% of 900 people is 72 (0.08 * 900 = 72).

A Nurse Measured the Blood Pressure of Each Person Who